airway(s)

Figure 1: Ascending nerve pathways and proprioceptive reflex arcs, represented in diagrammatic sections of the brain and spinal cord. Shown on the right: those serving the sensations listed. Shown on the left: reflex pathways for skeletal muscle control. (A) From a muscle spindle, to a synapse with an alpha motor neuron, and a branch to the brain. (B) From a tendon organ, inhibitory branch (broken line) to an alpha motor neuron, and a branch to the brain.

airway(s)

the passage(s) from the mouth or nose via the pharynx, larynx, trachea and the branching bronchial tree to the alveoli of the lungs. Airway (singular ) usually refers to the upper airway (upper respiratory tract) which may need to be cleared of inhaled or vomited material, e.g. before mouth-to-mouth (or -nose) resuscitation. Airways (plural) refers to the bronchial tree within the lungs, particularly in the context of chronic obstructive airways disease and asthma, when the smallest branches are narrowed. Figure 1.